Many people assume the native frangipani of Australia is just a local version of the tropical frangipani. It is not. Hymenosporum flavum belongs to a different plant family from plumeria, and the two share a common name mostly because their flowers look a bit alike.
This guide explains what each plant is, how to tell them apart at a glance, and how their growing needs differ. If you want the naming question for plumeria itself, our guide on plumeria vs frangipani covers it.
Native Frangipani Is Not a Plumeria
According to Plants of the World Online, the accepted name is Hymenosporum flavum (Hook.) F.Muell. It sits in the family Pittosporaceae, the same family as the pittosporum shrubs many gardeners know. It is the only species in its genus.
Plumeria belongs to the dogbane family, Apocynaceae. That is a separate family, and the two groups are not close relatives. If you want the basics of the genus, start with what plumeria is.
The shared name came from the flowers. A native plants society in Australia notes that the blooms are about the size and shape of frangipani flowers, and that the trees otherwise look nothing alike. So it is a look alike by name, not a cousin.
Where Each Plant Comes From
Hymenosporum flavum grows wild in eastern Australia and southeastern New Guinea. Kew lists New South Wales and Queensland for Australia. One regional botanical page describes it as native to north eastern Queensland, so the exact range is described differently depending on the source.
Plumeria is a tropical American group. Its story, including how it spread across the Pacific and Asia, is told in our guide to where plumeria comes from. The two plants evolved on opposite sides of the world.
How to Tell Them Apart
You can separate them quickly once you know what to look at. The table below compares the traits that gardeners most often use.
| Trait | Hymenosporum flavum | Plumeria |
|---|---|---|
| Family | Pittosporaceae | Apocynaceae |
| Growth form | Slender, upright, pyramidal tree | Thick, fleshy, branching stems |
| Leaves | Dark green, glossy, evergreen | Large, often deciduous in winter |
| Flower color | Cream, aging to deep yellow | Wide range, many cultivars |
| Flower size | About 3 to 5 cm across | Often larger |
| Flower clusters | Many small blooms per cluster | Large terminal clusters |
| Nectar | Yes, reported | None (scent but no nectar) |
| Fruit | Flat capsule with winged seeds | Paired, slender seed pods |
Leaves and branches
This is the easiest tell. One is a tall, narrow tree with glossy leaves that stay on year round, while plumeria has thick, almost succulent branches that look bare for months in cool weather. Our guide to Plumeria rubra shows what that species looks like in detail.
Flowers
The flowers open cream and darken to yellow with age. They are roughly 3 to 5 cm across and sit in terminal clusters. Plumeria flowers come in whites, pinks, reds, yellows and blends, and the best known types are bigger and waxier.
A cut plumeria stem also bleeds milky white sap, which irritates skin. We cover that in is plumeria poisonous.
Scent
Both plants are described as sweetly perfumed. The Australian tree is often called strongly scented, and plumeria fragrance ranges from citrus to spice to coconut depending on the variety. The range is explained in what plumeria smells like.
Size and Shape
Sources do not agree on mature height. One Australian plants society says up to 10 m in cultivation, a national magazine gives 5 to 8 m for gardens, and a home gardening site gives around 15 m. Wild rainforest trees can reach much higher, so the answer depends on climate, soil and room.
Plumeria is usually a smaller, wider, rounder tree. It can be kept compact with pruning and container growing, which is not how the Australian tree is usually grown.
Growing Notes for Native Frangipani
Do not follow plumeria care advice for this tree. The needs are different. These notes come from Australian gardening and plant society sources, so they suit that climate best.
- Sun: Full sun is best, though some shade is tolerated.
- Soil: Well drained soil, ideally low in phosphorus. One society reports it doing well on alkaline to neutral clays and even limey soils.
- Water: Water well while it establishes. Established trees handle long dry spells, but need a drink in hot, dry weather.
- Frost: Young plants need frost protection until they are a couple of meters tall. How cold tolerance holds up for mature trees is not well documented.
- Feeding: Usually not needed. If you feed, use a low phosphorus native plant product.
- Pests: Scale insects can cause sooty mold and yellowing, and horticultural oil is the usual response.
- Pruning: Rarely needed, since the natural shape is upright and tidy.
Plumeria is nearly the opposite on several points. It wants a high phosphorus feed, a dry winter rest and lots of heat. For the full routine, see plumeria care.
Propagation
The Australian tree is grown from seed, since its capsules hold many flat, winged seeds that germinate freely, according to one plant society. Plumeria is mostly multiplied by cuttings, because seedlings do not come true. Our guide to propagating plumeria walks through the methods.
Which One Is Right for You?
Choose the Australian tree if you live in a mild or subtropical climate in eastern Australia and want an evergreen tree that feeds birds and insects. Choose plumeria if you want large, showy, richly colored flowers and have the heat for it.
Many nurseries label either plant as frangipani, so check the botanical name on the tag. Hymenosporum flavum is the native one. Anything labeled Plumeria is the tropical flower.
The Plumerist toolkit
The gear we would buy if we were starting over.
As an Amazon Associate, Plumerist earns from qualifying purchases.
Frequently Asked Questions
Is native frangipani related to plumeria?
No. Native frangipani is in the Pittosporaceae family, while plumeria is in the Apocynaceae family. The shared name comes from flower resemblance only.
Is native frangipani deciduous?
No. It is described as an evergreen tree, whereas plumeria commonly drops its leaves in winter or cool weather.
Does it smell like plumeria?
Both are described as sweetly scented, but they are different plants with their own perfume. The tree is often called strongly fragrant, while plumeria scent depends on the cultivar.
Can I grow it in a pot like plumeria?
It is a tall tree, and it is mainly grown in the ground. Container growing is not well documented. Some Australian nurseries sell a dwarf form, which would suit a pot better.
What is the scientific name of native frangipani?
The accepted name is Hymenosporum flavum. The only listed synonym is Pittosporum flavum.
Is the Australian tree toxic like plumeria?
Plumeria sap is irritating, but we did not find a reliable toxicity statement for Hymenosporum. Treat any unfamiliar plant with care around pets and children.